(1):
(p. pr. & vb. n.) of Begin
(2):
(n.) That which is begun; a rudiment or element.
(3):
(n.) The act of doing that which begins anything; commencement of an action, state, or space of time; entrance into being or upon a course; the first act, effort, or state of a succession of acts or states.
(4):
(n.) That which begins or originates something; the first cause; origin; source.
(5):
(n.) Enterprise.